An astronomer from the Institute of Astronomy at Hawaii University and an international team published a new study that reveals more than the vast cosmic structure around the Milky Way Galaxy.
The universe is a tapestry of galactic assemblies and huge cavities. In a new study reported in The Astrophysical Journal Brent Tully's team applied the same tools from an earlier study to chart the size and shape of a vast, empty region that they call Local Lack Border with the Milky Way Galaxy, Using the observations of galaxy movements, they draw conclusions about the distribution of the mass responsible for this movement, and construct three-dimensional maps of our local universe.
Galaxies not only move with the overall expansion of the universe, but also respond to the gravitational pull of neighbors and regions with many masses. As a result, they move to the densest areas and away from areas with a small mass ̵
Although we live in a space metropolis, back in 1987, Toully and Richard Fisher noted that our Milky Way galaxy is also at the expense of a vast, empty region called Local Lack. The existence of the Local Desert is widely accepted, but it remains weakly studied because it is behind the center of our galaxy and is therefore heavily obscured by our vision.
Now Tully and his team measured the movements of 18,000 galaxies. in the Cosmicflows-3 compass of the galactic distances, constructing a cosmogram that highlights the boundary between the gathering of matter and the absence of matter that defines the edge of the Local Desert. They use the same technique in 2014 to identify the full level of our home superclass of more than one hundred thousand galaxies, giving it the name Lanyakea, which means "a huge sky" in Hawaii.  For 30 years, astronomers have tried to identify. Why the movements of the Milky Way, our closest neighbor to the Andromeda galaxy, and their smaller neighbors deviate from the overall expansion of the universe by more than 600 km / s (1.3 million mph). The new study shows that approximately half of this movement is generated "locally" by the combination of pulling from the massive close-knot Virgo and our involvement in expanding the local wilderness as it becomes more and more empty.
t can be seen in a video (below) and alternatively with an interactive model (below). With an interactive model, the viewer can pan, scroll, rotate, and stop / activate the evolution of orbital time. Orbits are shown in a reference frame that eliminates the general expansion of the universe. What we see is the deviations from the cosmic expansion caused by the interaction of local sources of gravity.
Galactic orbits in local superclub
Cosmic Streams-3: Cosmography of the Local Void, Astrophysical Journal (2019). DOI: 10.3847 / 1538-4357 / ab2597
Astronomers spot a huge void in our space neighborhood (2019, July 22)
drawn up on 22 July 2019
This document is subject to copyright. Apart from any honest work for the purposes of private research or research, no
may be reproduced without written permission. Content is provided for information purposes only.